Sample Letter to Bank Informing the Death of the Account Holder. The death claim letter should be written in the formal letter format.Informal probate is the process for asking the court to appoint a personal representative for a decedent's estate without a hearing. To sum up, I want to inform you that my husband died in a car accident on 28th July 2022. Moreover, he has a savings bank account in your bank. Some places, such as a bank or utility company, need to see a death certificate to verify that a person has died. What do you write in a death notice?